Partially refactored and cleaned up the ExtractorTab class. 
Cleared out unused functions in SemSimOWLFactory.
Fixed bug that was causing a null pointer exception to occur when a
functional submodel that lacked a description was loaded.
Fixed bug preventing the human readable definition dialog from appearing
when the free text definition was clicked in the composite editing
panel.
Removed unused functions from SemSimOWLFactory.
Added static frame handle to SemGenError to allow the parent frame to be
set for all error dialogs at runtime.
Merge remote-tracking branch 'origin/Refactoring' into Refactoring